Best 12V 300Ah and 400Ah Lithium Deep Cycle Batteries

12V 300Ah and 400Ah lithium deep cycle batteries are becoming more and more popular for powering electric vehicles, trolling motors, as RV house batteries, as off-the-grid batteries, as inverter batteries, etc.

With their huge capacity, relatively lightweight construction, a large number of supported charging/discharging cycles, these batteries can directly support loads and energy requirements that were impossible to meet with much heavier lead-acid batteries just a few years ago.

Updated: September 26, 2024.

12V 300Ah and 400Ah Lithium Batteries Features and Specifications

Deep cycle lithium batteries are based on the Lithium Iron Phosphate (LiFePO₄) chemistry, which features a nominal cell voltage of 3.2V, a maximum charging voltage of 3.6-3.7 volts, and a minimum recommended discharging voltage of 2.6-2.8 volts.

Note: maximum charging voltage and minimum discharge voltage are model-dependent and may vary slightly from the battery to the battery.

In order to create 12V batteries, 4 (four) cells must be connected in series in order to create a battery with a nominal voltage of 12.8V.

When compared with similar 12V lead-acid batteries, lithium batteries have some pros, including:

• a much larger number of supported charging/discharging cycles,
• lightweight construction,
• almost no capacity loss when the discharge current approaches 1C,
• higher discharge voltage - when discharged with 0.1C current, many lithium batteries hold their output voltage ~12.8V for at least 90% of their discharge time,
• faster recharging, etc.

However, lithium batteries also have some cons, including:

• more sensitive to charging/discharging conditions - hence, lithium batteries come with builtin Battery Management Systems (BMS), which protect the batteries from unwanted events, like overcharging, over-discharging, high and low temperatures, short circuits and similar,
• more sensitive when connecting them in parallel and/or series,
• higher initial price.

Of course, there are other pros and cons as well, but these are the most important ones.

12V 300Ah and 400Ah lithium batteries are physically large batteries and are usually offered as BCI Group 4D batteries, 6D batteries, 8D batteries, or as batteries with custom size. Standard BCI dimensions of the 4D, 6D and 8D battery groups are as follows:

• Group 4D Batteries dimensions: 20 3/4 x 8 3/4 x 9 7/8 inches (20.75 x 8.75 x 9.875 inches, 527 x 222 x 250 mm),
• Group 6D Batteries dimensions: 20 3/4 x 10 x 10 1/4 inches (20.75 x 10 x 10.25 inches, 527 x 254 x 260 mm),
• Group 8D Batteries dimensions: 20 3/4 x 11 1/8 x 9 7/8 inches (20.75 x 11.125 x 9.875 inches, 527 x 283 x 250).

Note: 300Ah and 400Ah batteries with 24 or higher output voltages can be found too, but these batteries are usually custom-built and cannot be found in standard dimensions.

The following comparison chart lists some of the most popular 300Ah and 400Ah deep-cycle lithium batteries with their most important features and specifications:

As one can see, 12V 300Ah and 400Ah lithium batteries are big units that can store large amounts of energy and release it when most needed. And they are surprisingly lightweight when compared with lead-acid batteries.

Here is our list of the most popular and the best 12V 300Ah and 400Ah lithium batteries with their short reviews and recommendations - the list is ordered alphabetically:

Ampere Time 12V 300Ah Plus Deep Cycle Lithium Battery

Ampere Time 12V 300Ah Plus Deep Cycle Lithium Battery is one of the most popular and in the end, one of the best batteries in this class.

The battery features physical dimensions of 20.47 x 9.37 x 8.54 inches and as such, it belongs to the BCI Group 8D, although some sources claim that it is BCI Group 4D battery - such claims are typical for 4D/6D/8D batteries, hence the need to check the actual battery dimensions.

Also, the battery weighs ~63 pounds (~28.54 kg).

The built-in Battery Management System allows a constant discharge current of 200 Amps and 400 Amps for 5 seconds. The maximum allowed constant charging current is also 200 Amps, although 0.5C (150 Amps) is the maximum recommended continuous charging current.

Charging temperature is from 0°C to 50°C, with discharging temperature range between -20°C to +60°C.

The maximum load of the battery is considered to be 2560 Watts (12.8V x 200A = 2560W), however, as the battery is discharged, its output voltage slowly drops - not as nearly as the voltage of lead-acid batteries, but nonetheless, it drops.

Note: this goes for all similar lithium batteries, not just for the Ampere 12V 300Ah battery.

Thus, it is safe to assume that the battery can support 2400W (12V x 200A) most of the time - when the battery is being discharged, for example, with 0.5C (150A), the output voltage is >12V at least 75-80% of the discharge cycle.

Ampere Time 12V 300Ah battery comes with M8 battery terminals and supports 4000+ charging/discharging cycles.

Also, the battery supports up to 4S4P series/parallel connections, allowing the users to create battery packs with up to 1200Ah capacity and up to 48V (51.2V) voltage.

At first, the Ampere Time 12V 300Ah battery appears more expensive than a similar lead-acid battery, and initially, it is more expensive, but in the long run, it actually saves money.

For more reviews and recommendations, feel free to check the Ampere Time 12V 300Ah Plus Deep Cycle Lithium Battery Amazon link (link opens in the new window).

Chins 12V 300Ah Deep Cycle Lithium Battery

Chins 12V 300Ah Deep Cycle Lithium Battery features physical dimensions of 20.55 x 9.45 x 8.58 inches and weighs 67.3 pounds (30.5 kg).

Chins 12V 300Ah lithium battery supports at least 2000+ charging/discharging cycles with maximum allowed charging current of 120 Amps, maximum recommended charging current of 60 Amps, maximum continuous discharge current of 200 Amps, and maximum surge current of 600A for 5 seconds.

Also, Chins 12V 300Ah battery supports connecting up to 4 batteries in parallel and series - 4S4P (16 batteries) allowing the user to create a 1200Ah 48V (51.2V) battery pack.

Chins 12V 300Ah comes with M8 battery terminals and charging temperature range of 0°C to 50°C and discharge temperature range of -20°C to +60°C.

For more reviews and recommendations, feel free to check the Chins 12V 300Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).

Note: Chins also offers a 12V 300Ah deep cycle lithium battery with a built-in Bluetooth system, low-temperature charging (-31°F, -35°C), 4S4P connectivity, etc. For more about this battery, feel free to check the Chins 12V 300Ah Smart Lithium Battery Amazon link (link opens in the new window).

Chins 12V 400Ah Deep Cycle Lithium Battery

Chins 12V 400Ah Deep Cycle Lithium Battery is a large and powerful battery that allows users to make battery packs even for the most demanding applications.

Chins 12V 400Ah Deep Cycle Lithium Battery features physical dimensions of 20.47 x 10.59 x 8.66 inches and weighs 86.4 pounds (39.2 kg) - if that doesn't sound "lightweight", a similar AGM battery (or battery pack) weighs ~2.5-3 times more and if the capacity drop (high discharge current) of lead-acid batteries is taken into account, Chins 12V 400Ah battery is 3-5 times lighter than similar (of similar capacity) lead-acid battery.

Chins 12V 400Ah Deep Cycle Lithium Battery support 2000+ charging/discharging cycles (down to 80% DoD), and features maximum allowed charging current of 110A, maximum recommended continuous charging current of "only" 60 Amps, maximum continuous discharge current of 200 Amps and maximum surge current of 750 Amps for 5 seconds.

The charging temperature range is 0°C to 50°C and the discharging temperature range is between -20°C and +60°C.

Also, the battery allows 4S4P series/parallel connections - if required, users can create a battery pack that features 1600 Ah, can provide 800 Amps continuously, 3000 Amps for 5 seconds, with a maximum voltage of 48V (51.2V).

For more reviews and recommendations, feel free to check the Chins 12V 400Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).

JITA 12V 300Ah Deep Cycle Lithium Battery

JITA 12V 300Ah Deep Cycle Lithium Battery features physical dimensions of 20.5 x 9.37 x 8.54 inches and it weighs 59.5 pounds (~27 kg).

The battery supports a maximum continuous discharge current of 200 Amps and 4S4P connections.

A maximum number of charging/discharging cycles depends on the battery use, age, temperature, and similar, but on average battery supports 2000-4000 charging/discharging cycles.

Also, it features a typical charging temperature range of 0°C to 50°C and discharging temperature range of -20°C to +60°C.

In order to ensure proper operation during cold winter days, JITA also offers a low-temperature 12V 300Ah lithium deep cycle battery that features an internal battery heater - such battery supports charging temperature range of -31°F to +122°F (-35°C to 50°C) and discharging temperature range of -4°F to 140°F (-20°C to 60°C).

For more reviews and recommendations, feel free to check the JITA 12V 300Ah Deep Cycle Lithium Battery and JITA 12V 300Ah Lithium Battery With Heater Amazon links (links open in the new windows).

JITA 12V 400Ah Deep Cycle Lithium Battery

JITA 12V 400Ah Deep Cycle Lithium Battery features physical dimensions of 20.5 x 9.4 x 8.5 inches, and it weighs 83.7 pounds (37.9 kg).

The battery features a maximum discharge current of 200 Amps with a maximum surge current of 400 Amps for 5 seconds. The maximum continuous charging current is 200Amps, allowing the user to recharge the battery completely in ~2h - in order to prolong the battery life, using charging currents up to 100 Amps is recommended.

Also, the battery allows creation of battery packs with up to 4S4P connections (up to 1600Ah capacity, up to 48V (51.2V)).

The battery features a charging temperature range of 0°C to +50°C and discharging temperature range of -20°C to +60°C.

Depending on the battery use, JITA 12V 400Ah Deep Cycle Lithium Battery ensures 2000-5000 charging/discharging cycles.

For more reviews and recommendations, feel free to check the JITA 12V 400Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).

Lossigy 12V 300Ah Deep Cycle Lithium Battery

Lossigy 12V 300Ah Deep Cycle Lithium Battery features physical dimensions of 20.55 x 10.6 x 8.58 inches, it weighs ~72 pounds (~32.6 kg) and features M8 battery terminals.

Single Lossigy 12V 300Ah Deep Cycle Lithium Battery features 200 Amps maximum allowed charging and discharging cycles and allows 4S10P connections - up to 4 batteries in series and up to 10(!) batteries in parallel (that is up to 3000 Ah large battery pack!).

Also, Lossigy 12V 300Ah Deep Cycle Lithium Battery features typical charging (0°C to +50°C) and discharging (-20°C to +60°C) temperature range for LiFePO₄ high-capacity deep-cycle batteries.

If You need to create extra-large battery packs, consider one of the Lossigy lithium battery models.

For more reviews and recommendations, feel free to check the Lossigy 12V 300Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).

Lossigy 12V 400Ah Deep Cycle Lithium Battery

In many ways, the Lossigy 12V 400Ah Deep Cycle Lithium Battery is very similar to the Lossigy 12V 300Ah battery.

Lossigy 12V 400Ah Deep Cycle Lithium Battery features physical dimensions of 20.5 x 10.6 x 8.6 inches, weighs 95 pounds (43 kg), and features M8 battery terminals.

Also, it supports maximum charging/discharging currents of up to 200 Amps and supports up to 4S10P battery connections, allowing the users to create a battery pack with the capacity of 4000Ah(!) and 48V (51.2V).

Depending on its use, Lossigy 12V 400Ah Deep Cycle Lithium Battery supports 2000-4000+ charging/discharging cycles.

For more reviews and recommendations, feel free to check the Lossigy 12V 400Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).

Pionergy 12V 300Ah Deep Cycle Lithium Battery

Pionergy 12V 300Ah Deep Cycle Lithium Battery is a balanced high-capacity lithium battery featuring physical dimensions of 20.5 x 9.4 x 8.54 inches, the weight of 71.2 pounds (32.3 kg), and M6 battery terminals.

The battery supports a maximum current of 200 Amps, and 4S2P connectivity - the battery can be used to create battery packs up to 600Ah and up to 48V (51.2V).

The battery features typical charging (0°C to +50°C) and discharging (-20°C to +60°C) temperature range for LiFePO₄ high-capacity deep-cycle batteries and supports 4000+ charging/discharging cycles.

For more reviews and recommendations, feel free to check the Pionergy 12V 300Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).

Power Queen 12V 300Ah Deep Cycle Lithium Battery

Power Queen 12V 300Ah Deep Cycle Lithium Battery features physical dimensions of 20.5 x 9.37 x 8.54 inches, it weighs 62.8 pounds (28.5 kg) and features M8 battery terminals.

Power Queen 12V 300Ah Deep Cycle Lithium Battery supports maximum charging/discharging currents of up to 200 Amps and 4S4P connections, allowing the users to create battery packs up to 1200Ah and up to 48V (51.2V).

Also, it supports at least 4000 charging/discharging cycles, although this number also depends on the battery use, age, average temperature, and similar.

For more reviews and recommendations, feel free to check the Power Queen 12V 300Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).

Vatrer 12V 460AH 250A BMS Bluetooth Lithium Deep Cycle Battery

Vatrer 12V 460Ah battery is designed to fit 8D battery compartments with easy, while offering at the same time capacity of 460(!) Ah, for a total of ~5888Wh of energy.

The physical dimensions of the battery are (L x W x H) 18.9 x 10.82 x 9.84 inches (~48 x 27.5 x 25 cm), and it weighs ~105 pounds (~47.5 kg).

The maximum continuous discharge current is 250A, providing power for up to 3200W.

The maximum continuous charging current is 120A (~0.38C), but the maximum continuous recommended charging current is 92A (0.2C).

The number of charging and discharging cycles depends on many details, but mostly on Depth of Discharge (DoD%), and in the case of Vatrer 12V 460Ah, that means:

• 100% DoD: 2000 cycles,
• 80% DoD: 3000 cycles,
• 50% DoD: 5000 cycles,
• 30% DoD: 8000 cycles.

Advanced built-in Battery Management System (BMS) protects the battery from most unwanted events and it allows connecting up to 10 batteries in parallel for maximum capacity of 4600(!) Ah.

If larger voltages are needed, BMS ensures proper operation up to 4S4P, allowing the users to create battery packs up to 51.2V, 1840Ah → ~94 kWh, which is a lot of energy.

Additional fetures include low self-discharge rate, On/Off button, Bluetooth connectivity, and the built-in hygrometer and thermometer.

For more reviews and recommendations, feel free to check the Vatrer 12V 460Ah LiFePO4 RV Battery Vatrer Power official website link (non-affiliate link, opens in the new window) or Vatrer 12V 460Ah LiFePO4 RV Battery Amazon link (affiliate link, opens in the new window).

Zooms 12V 300Ah Deep Cycle Lithium Battery

Zooms 12V 300Ah Deep Cycle Lithium Battery is an increasingly popular battery featuring physical dimensions of 20.5 x 9.37 x 8.54 inches, it weighs 62.83 pounds (28.5 kg), featuring M8 battery terminals.

Maximum continuous charging/discharging currents are 200 Amps with the maximum supported 4S4P connectivity, allowing the users to create battery packs up to 1200Ah in capacity and up to 48V (51.2V).

Note: recommended charging current is 0.2C (60A).

Depending on its use, Zooms 12V 300Ah Deep Cycle Lithium Battery supports 4000+ charging/discharging cycles.

For more reviews and recommendations, feel free to check the Zooms 12V 300Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).

Few Final Words

High-capacity deep-discharge lithium batteries allow the users to create extra-large battery packs supporting large loads, including whole houses and large RV vehicles.

There is a relatively large number of 300Ah and 400Ah lithium batteries on the market:

Also, we have really tried to verify every single bit of information in this article (and our site), but things change over time without prior notice, so before ordering these batteries, do your own due diligence and check the details that are important for your future use of these batteries.

And whatever You do, stay safe - these batteries are protected by their internal BMSs, but nonetheless, they are capable of providing huge currents...